Mobile radio communication devices, mobile radio communication networks, and methods for controlling the same

ABSTRACT

A mobile radio communication device is described configured to operate in a first communication state and in a second communication state. The mobile radio communication device includes: a transmitter configured to transmit data to a mobile radio communication network when the mobile radio communication device is in a first communication state in which the mobile radio communication device is in a connection with a cell of the mobile radio communication network; a memory configured to store information based on the transmitted data; a cell determination circuit configured to determine a cell of a mobile radio communication network as a connection candidate based on the stored information; and a connection request circuit configured to request connection with the determined cell when the mobile radio communication device is in a second communication state in which the mobile radio communication device seeks a connection with a cell of a mobile radio communication network.

RELATED APPLICATION(S)

This application is a continuation of U.S. patent application Ser. No.14/025,901, entitled “MOBILE RADIO COMMUNICATION DEVICES, MOBILE RADIOCOMMUNICATION NETWORKS, AND METHODS FOR CONTROLLING THE SAME”, filed onSep. 13, 2013, and which is incorporated by reference herein in itsentirety.

TECHNICAL FIELD

The present disclosure generally relates to mobile radio communicationdevices, methods for controlling a mobile radio communication device,mobile radio communication networks, and methods for controlling amobile radio communication network.

BACKGROUND

A mobile station (or user equipment; UE) that is connected to an EUTRAN(Evolved Universal Terrestrial Radio Access Network) base station, forexample for user data reception or transmission, may lose thisconnection for several reasons. The UE might detect a radio linkfailure, handover or reconfiguration might fail or an integrity checkfails. In all failed cases listed above the mobile station may desire toperform a reestablishment Procedure trying to reconnect. The UE mayperform this reestablishment on the old serving cell that the UE wasconnected to or even on a different cell. This includes cells on sameEUTRA frequency or different EUTRA frequency. For this reestablishmentprocedure, the UE may synchronize on the cell and send an RRC ConnectionReestablishment Request message to the base station trying toreestablish the connection. This procedure may be cumbersome, and it maybe desired to get a connection with the base station with a limitednumber of tries. Thus, there may be a need for devices and methods thatprovide an efficient Reestablishment Procedure.

BRIEF DESCRIPTION OF THE DRAWINGS

In the drawings, like reference characters generally refer to the sameparts throughout the different views. The drawings are not necessarilyto scale, emphasis instead generally being placed upon illustrating theprinciples of the invention. In the following description, variousaspects are described with reference to the following drawings, inwhich:

FIG. 1 shows a mobile radio communication network, in which variousdevices and methods according to various aspects may be used.

FIG. 2A shows a mobile radio communication device with a transmitter, amemory, a cell determination circuit, and a connection request circuit.

FIG. 2B shows a mobile radio communication device with a transmitter, amemory, a cell determination circuit, a connection request circuit, ameasurement circuit, and a receiver.

FIG. 3A shows a mobile radio communication network with a plurality ofcells and a configuration information transmitter.

FIG. 3B shows a mobile radio communication network with a plurality ofcells, a configuration information transmitter, and a configurationindication transmitter.

FIG. 4A shows a flow diagram illustrating a method for controlling amobile radio communication device.

FIG. 4B shows a flow diagram illustrating alternative method forcontrolling a mobile radio communication network.

FIG. 5 shows a mobile radio communication network, in which a mobileradio communication device is connected to a cell and performsmeasurements.

FIG. 6 shows a mobile radio communication network, in which a mobileradio communication device reports measurement results.

FIG. 7 shows a mobile radio communication network, in which a mobileradio communication device receives confirmation of receipt ofmeasurement results from the mobile radio communication network.

FIG. 8 shows a mobile radio communication network, in which a mobileradio communication device has lost connection with a cell.

FIG. 9 shows a mobile radio communication network, in which a mobileradio communication device performs a connection reestablishment method.

DESCRIPTION OF EMBODIMENTS

The following detailed description refers to the accompanying drawingsthat show, by way of illustration, specific details and aspects of thisdisclosure in which the invention may be practiced. Other aspects may beutilized and structural, logical, and electrical changes may be madewithout departing from the scope of the invention. The various aspectsof this disclosure are not necessarily mutually exclusive, as someaspects of this disclosure can be combined with one or more otheraspects of this disclosure to form new aspects.

The terms “coupling” or “connection” are intended to include a direct“coupling” or direct “connection” as well as an indirect “coupling” orindirect “connection”, respectively.

The words “exemplary” or “example” or “for example” are used herein tomean “serving as an example, instance, or illustration”. Any aspect ofthis disclosure or design described herein as “exemplary” is notnecessarily to be construed as preferred or advantageous over otheraspect of this disclosure or designs.

A mobile radio communication device (which may also be referred to asend device) as referred to herein may be a device configured forwireless communication, for example a mobile phone, a desktop computeror a laptop. Furthermore, a mobile radio communication device may be anend-user mobile device (MD). A mobile radio communication device may beany kind of mobile radio communication device, mobile telephone,personal digital assistant, mobile computer, or any other mobile deviceconfigured for communication with a mobile communication base station(BS) or an access point (AP) and may be also referred to as a UserEquipment (UE), a mobile station (MS) or an advanced mobile station(advanced MS, AMS), for example in accordance with IEEE 802.16m.

The mobile radio communication device may include a memory which may forexample be used in the processing carried out by the mobile radiocommunication device. The mobile radio communication network may includea memory which may for example be used in the processing carried out bythe mobile radio communication network. A memory may be a volatilememory, for example a DRAM (Dynamic Random Access Memory) or anon-volatile memory, for example a PROM (Programmable Read Only Memory),an EPROM (Erasable PROM), EEPROM (Electrically Erasable PROM), or aflash memory, for example, a floating gate memory, a charge trappingmemory, an MRAM (Magnetoresistive Random Access Memory) or a PCRAM(Phase Change Random Access Memory).

As used herein, a “circuit” may be understood as any kind of a logicimplementing entity, which may be special purpose circuitry or aprocessor executing software stored in a memory, firmware, or anycombination thereof. Furthermore, a “circuit” may be a hard-wired logiccircuit or a programmable logic circuit such as a programmableprocessor, for example a microprocessor (for example a ComplexInstruction Set Computer (CISC) processor or a Reduced Instruction SetComputer (RISC) processor). A “circuit” may also be a processorexecuting software, for example any kind of computer program, forexample a computer program using a virtual machine code such as forexample Java. Any other kind of implementation of the respectivefunctions which will be described in more detail below may also beunderstood as a “circuit”. It may also be understood that any two (ormore) of the described circuits may be combined into one circuit.

Description is provided for devices, and description is provided formethods. It will be understood that basic properties of the devices alsohold for the methods and vice versa. Therefore, for sake of brevity,duplicate description of such properties may be omitted.

It will be understood that any property described herein for a specificdevice may also hold for any device described herein. It will beunderstood that any property described herein for a specific method mayalso hold for any method described herein.

FIG. 1 shows a mobile radio communication network 100, in which variousdevices and methods according to various aspects may be used. Forexample, A mobile radio communication device 102, which may also bereferred to as a mobile station or a user equipment (UE), may be in thecoverage area of a plurality of radio base stations, each radio basestation (or short: base station) supporting one or more cells. Forexample, a first base station (or a first cell) 104, a second basestation (or a second cell) 106, a third base station (or a third cell)108, a fourth base station (or a fourth cell) 110, and fifth basestation (or a fifth cell) 112 may be provided. A base station may forexample be an EUTRAN (Evolved Universal Terrestrial Radio AccessNetwork) base station, but may also be any other kind of base stationconfigured to communication with a mobile radio communication device.

A mobile station (UE), that is connected to the EUTRAN base station, forexample for user data reception or transmission, may lose thisconnection for several reasons. The UE might detect a radio linkfailure, handover or reconfiguration might fail or an integrity checkfails. In all failed cases listed above the mobile station may desire toperform a Reestablishment Procedure trying to reconnect. Thisreestablishment may be done on the old serving cell the UE was connectedto or even on a different cell. This includes cells on same EUTRAfrequency or different frequency. For this reestablishment procedure theUE may synchronize on the cell and send a RRC (radio resource control)Connection Reestablishment Request message to the base station trying toreestablish the connection.

The Reestablishment may only succeed in case the target cell isprepared, i.e. the target cell has a valid UE context. In case the cellis not prepared with a valid UE context, the reestablishment proceduremay fail and the connection between UE and network may be lost. A targetcell may be ‘prepared’ if it got delivered the UE context from thesource cell (and this may be a task or a step of the network, so thatthe UE may not know beforehand which base stations are prepared).

For performing this reestablishment procedure, the UE may have a networkassigned time duration available. Only during this time duration, the UEmay try to perform reestablishment. In case the reestablishment-trialdoes not succeed during the network given time frame (for examplebetween 10 and 20 seconds), the UE may return to idle mode and theconnection may finally be lost.

As of today's solutions, the UE performs a cell search and once a cellis found, the UE selects this cell and starts the reestablishmentprocedure. But the network may not have prepared this cell forreestablishment resulting in a non-successful reestablishment attempt.The UE may then be forced to go back to idle and to release theconnection.

Today's solutions do not consider if a cell is prepared forreestablishment or not. On one hand, the UE may not exclude cells fromreestablishment that are not probably prepared and there is also noprioritization among the cells which are good candidates for preparedcells. For the cell search procedure for reestablishment, theidle-cell-search procedure is reused, which just relies on signalstrength and quality of all available cells, frequencies and bands. Thisprocedure may be very slow and will probably choose not prepared cells.

In the GSM (Global System for Mobile Communications) network, thenetwork may broadcast a bit, which tells the UE whether reestablishmentis allowed on this cell. But this is a very static bit and cannot bechanged quickly by the network. It is more to tell the UE thatreestablishment is more or less not implemented in this cell or in theinterface from network to the cell. Even if this bit tells the UE thatreestablishment is allowed, it does not guarantee that thereestablishment will be successful, if for example the target cell doesnot have the context

Currently, there is no mechanism in place for the UE to detect or topredict if a cell is or might be prepared for reestablishment. The UEwill try to perform reestablishment only based on cells found duringcell search procedure which may be based on received signal strength orsignal quality and may be completely independent of thepreparation-status of a cell. This may cause higher rates of failedreestablishment procedures and therefore also higher rate of drops ofthe connection.

According to various aspects of the present disclosures, devices andmethods are provided for determining an order in which the cells shouldbe searched for the purpose of reestablishment. This may both decreasethe duration of the gap in the connection and reduce the probability oflosing the connection completely.

Various devices and methods provide an optimized EUTRA ReestablishmentProcedure.

FIG. 2A shows a mobile radio communication device 200. The mobile radiocommunication device 200 may be configured to operate in a firstcommunication state and in a second communication state. In the firstcommunication state, the mobile radio communication device 200 may be ina connection with a cell of a mobile radio communication network (notshown). In the second communication state, the mobile radiocommunication device 200 may seek a connection with a cell of a mobileradio communication network. The mobile radio communication device 200may include a transmitter 202 configured to transmit data to the mobileradio communication network when the mobile radio communication device200 is in the first communication state. The mobile radio communicationdevice 200 may further include a memory 204 configured to storeinformation based on the transmitted data. For example, the memory 204may store the data when the mobile radio communication device 200 is inthe first communication state. The memory 204 may furthermore storeinformation about collected data (for example information about quality,about neighbors or about a reason why the mobile radio communicationdevice 200 is seeking connection with a cell of the mobile radiocommunication network). For example, the memory 204 may store the datawhen the mobile radio communication device 200 is in the secondcommunication state. For example, the memory 204 may store the dataindependent from the communication state of the mobile radiocommunication device 200. The mobile radio communication device 200 mayfurther include a cell determination circuit 206 configured to determine(for example when the mobile radio communication device 200 is in thefirst communication state; for example when the mobile radiocommunication device 200 is in the second communication state; forexample independent from the communication state of the mobile radiocommunication device 200) a cell of a mobile radio communication networkas a connection candidate based on the stored information. The mobileradio communication device 200 may further include a connection requestcircuit 208 configured to request connection with the determined cell(for example to request a reestablishment of a (previous) connection)when the mobile radio communication device 200 is in the secondcommunication state. The transmitter 202, the memory 204, the celldetermination circuit 206, and the connection request circuit 208 may becoupled with each other, for example via a connection 210, for examplean optical connection or an electrical connection, such as for example acable or a computer bus or via any other suitable electrical connectionto exchange electrical signals.

In other words, the mobile radio communication device 200 may determinea cell to which the mobile radio communication device 200 requestsconnection based on information sent from the mobile radio communicationdevice 200 as long as a connection to a cell has still been active.

The first communication state may be a connected state.

The second communication state may be a connected state in whichconnection has been temporarily lost or an idle state.

The data may include or may be reception quality information indicatinga reception quality from a neighboring cell.

The data may include or may be a measurement report.

The information may include or may be information identifying theneighboring cell.

The information may include or may be information identifying thereception quality.

The information may include or may be information indicating a reasonwhy the mobile radio communication device is seeking a connection with acell, for example a reason of a temporary gap in the call.

The information may include or may be information indicating a timing,for example information indicating a time of drop and a length of aperiod of time which has already passed time when determining a cell.

The cell determination circuit 206 may further be configured todetermine the cell based on the reception quality.

The cell determination circuit 206 may further be configured todetermine a cell with a maximum reception quality as the cell.

FIG. 2B shows a mobile radio communication device 212. The mobile radiocommunication device 212 may, similar to the mobile radio communicationdevice 200 of FIG. 2A, include a transmitter 202. The mobile radiocommunication device 212 may, similar to the mobile radio communicationdevice 200 of FIG. 2A, further include a memory 204. The mobile radiocommunication device 212 may, similar to the mobile radio communicationdevice 200 of FIG. 2A, further include a cell determination circuit 206.The mobile radio communication device 212 may, similar to the mobileradio communication device 200 of FIG. 2A, further include a connectionrequest circuit 208. The mobile radio communication device 212 mayfurther include a measurement circuit 214, like will be described below.The mobile radio communication device 212 may further include a receiver216, like will be described below. The transmitter 202, the memory 204,the cell determination circuit 206, the connection request circuit 208,the measurement circuit 214, and the receiver 216 may be coupled witheach other, for example via a connection 218, for example an opticalconnection or an electrical connection, such as for example a cable or acomputer bus or via any other suitable electrical connection to exchangeelectrical signals.

The measurement circuit 214 may be configured to measure a receptionquality from a neighboring cell (for example, the measurement circuit214 may be configured to prepare a measurement report).

The receiver 216 may be configured to receive a confirmation of receiptof the data from the mobile radio communication network.

The information may include or may be information indicating receipt ofthe confirmation of receipt.

The cell determination circuit 206 may further be configured todetermine the cell based on the information indicating receipt of theconfirmation of receipt. It will be understood that the celldetermination circuit 206 may determine the cell for example as a cellfor which a measurement report has been transmitted and for whichmeasurement report the mobile radio communication device 200 hasreceived confirmation of receipt of this measurement report;furthermore, for example if there is no such cell or if connection withall such cells is not successful, the cell determination circuit 206 maydetermine the cell as a cell for which a measurement report has beentransmitted and for which measurement report the mobile radiocommunication device 200 has not received confirmation of receipt ofthis measurement report (such a cell may for example be prepared, as forexample the measurement report may have been received by the network,but just the confirmation of receipt may have been lost).

The cell determination circuit 206 may further be configured todetermine a cell for which receipt is confirmed.

FIG. 3A shows a mobile radio communication network 300. The mobile radiocommunication network 300 may include a plurality of cells, for examplea first cell 302 and a second cell 304. The first cell 302 may beconfigured to receive data from a mobile radio communication device (notshown). The mobile radio communication network 300 may further include aconfiguration information transmitter 306 configured to transmit to thesecond cell 304 configuration information based on the receivedinformation. The plurality of cells and the configuration informationtransmitter 306 may be coupled with each other, for example via aconnection 308, for example an optical connection or an electricalconnection, such as for example a cable or a computer bus or via anyother suitable electrical connection to exchange electrical signals.

In other words, once the mobile radio communication network 300 receivespredetermined data (for example a measurement report indicationmeasurement results for the second cell 304) from a mobile communicationdevice (for example via the first cell 302) it transmits configurationinformation to a second cell 304.

FIG. 3B shows a mobile radio communication network 310. The mobile radiocommunication network 310 may, similar to the mobile radio communicationnetwork 300 of FIG. 3A, include a plurality of cells (for example afirst cell 302 and a second cell 304). The mobile radio communicationnetwork 310 may, similar to the mobile radio communication network 300of FIG. 3A, further include a configuration information transmitter 306.The mobile radio communication network 310 may further include aconfiguration indication transmitter 312 configured to transmit to themobile radio communication device an indication indicating that themobile radio communication network 310 has transmitted configurationinformation to the second cell. The plurality of cells, theconfiguration information transmitter 306, and the configurationindication transmitter 312 may be coupled with each other, for examplevia a connection 314, for example an optical connection or an electricalconnection, such as for example a cable or a computer bus or via anyother suitable electrical connection to exchange electrical signals.

The indication may include or may be at least one of an identifier ofthe cell, a frequencies to be used for reestablishment attempts, anindication of whether intra reestablishments are possible or anindication of whether inter reestablishments are possible.

The configuration information transmitter 306 may further be configuredto transmit the configuration information to a plurality of cells.

The configuration information transmitter 306 may further be configuredto broadcast the configuration information.

The configuration information may include or may be a flag indicatingthe second cell.

The second cell 304 may include the configuration indication transmitter306.

The configuration indication transmitter 312 may further be configuredto transmit the indication to a plurality of mobile radio communicationdevices.

The configuration indication transmitter 312 may further be configuredto broadcast the indication.

The indication may include or may be at least one of a flag indicatingthat the second cell has received the configuration information, anidentifier of the cell to which the mobile radio communication devicewas connected before, identifiers of a plurality of mobile radiocommunication devices for which the cell has received configurationinformation.

The configuration information may include or may be a context of themobile radio communication device.

The configuration information may include or may be at least one ofconfiguration details of the mobile radio communication device,frequencies used for communication of the mobile radio communicationdevice with the mobile radio communication network 310, capabilities ofthe mobile radio communication or cipher information.

FIG. 4A shows a flow diagram 400 illustrating a method for controlling amobile radio communication device to operate in a first communicationstate and in a second communication state. In the first communicationstate, the mobile radio communication device may be in a connection witha cell of a mobile radio communication network. In the secondcommunication state, the mobile radio communication device seeks aconnection with a cell of a mobile radio communication network. In 402,a transmitter of the mobile radio communication device may transmit datato the mobile radio communication network when the mobile radiocommunication device is in the first communication state. In 404, amemory of the mobile radio communication device may store informationbased on the transmitted data. The memory may furthermore storeinformation about collected data (for example information about quality,about neighbors or about a reason why the mobile radio communicationdevice is seeking connection with a cell of the mobile radiocommunication network). In 406, a cell determination circuit of themobile radio communication device may determine a cell of a mobile radiocommunication network as a connection candidate based on the storedinformation. In 408, a connection request circuit of the mobile radiocommunication device may request connection with the determined cell(for example may request a reestablishment of a (previous) connection)when the mobile radio communication device is in the secondcommunication state.

The first communication state may be a connected state.

The second communication state may be a connected state in whichconnection has been temporarily lost or an idle state.

The data may include or may be reception quality information indicatinga reception quality from a neighboring cell.

The data may include or may be a measurement report.

The information may include or may be information identifying theneighboring cell.

The information may include or may be information identifying thereception quality.

The information may include or may be information indicating a reasonwhy the mobile radio communication device is seeking a connection with acell, for example a reason of a temporary gap in the call.

The information may include or may be information indicating a timing,for example information indicating a time of drop and a length of aperiod of time which has already passed time when determining a cell.

The method may further include determining the cell based on thereception quality.

The method may further include determining a cell with a maximumreception quality as the cell.

The method may further include measuring a reception quality from aneighboring cell.

The method may further include receiving a confirmation of receipt ofthe data from the mobile radio communication network. It will beunderstood that the cell determination circuit may determine the cellfor example as a cell for which a measurement report has beentransmitted and for which measurement report the mobile radiocommunication device has received confirmation of receipt of thismeasurement report; furthermore, for example if there is no such cell orif connection with all such cells is not successful, the celldetermination circuit may determine the cell as a cell for which ameasurement report has been transmitted and for which measurement reportthe mobile radio communication device has not received confirmation ofreceipt of this measurement report (such a cell may for example beprepared, as for example the measurement report may have been receivedby the network, but just the confirmation of receipt may have beenlost).

The information may include or may be information indicating receipt ofthe confirmation of receipt.

The method may further include determining the cell based on theinformation indicating receipt of the confirmation of receipt.

The method may further include determining a cell for which receipt isconfirmed.

FIG. 4B shows a flow diagram 410 illustrating a method for controlling amobile radio communication network. In 412, a first cell of a pluralityof cells of the mobile radio communication network may receive data froma mobile radio communication device. In 414, a configuration informationtransmitter of the mobile radio communication network may transmit to asecond cell of the plurality of cells configuration information based onthe received information.

The method may further include transmitting to the mobile radiocommunication device an indication indicating that the mobile radiocommunication network has transmitted configuration information to thesecond cell.

The indication may include or may be at least one of an identifier ofthe cell, a frequencies to be used for reestablishment attempts, anindication of whether intra reestablishments are possible or anindication of whether inter reestablishments are possible.

The method may further include transmitting the configurationinformation to a plurality of cells.

The method may further include broadcasting the configurationinformation.

The indication may include or may be a flag indicating the second cell.

The method may further include transmitting the indication from thesecond cell.

The method may further include transmitting the indication to aplurality of mobile radio communication devices.

The method may further include broadcasting the indication.

The indication may include or may be at least one of a flag indicatingthat the second cell has received the configuration information, anidentifier of the cell to which the mobile radio communication devicewas connected before, identifiers of a plurality of mobile radiocommunication devices for which the cell has received configurationinformation.

The configuration information may include or may be a context of themobile radio communication device.

The configuration information may include or may be at least one ofconfiguration details of the mobile radio communication device,frequencies used for communication of the mobile radio communicationdevice with the mobile radio communication network, capabilities of themobile radio communication or cipher information.

An UE based mechanism may be provided to detect that a cell potentiallyis a prepared cell. The reestablishment trials may be enhanced to morethan one cell in case the first attempt (or the first attempts) was (orwere) not successful. In addition, a mechanism may be provided to createa list of candidate cells for reestablishment based on pre-determinedcriteria. The criteria may be used to evaluate the order of cells forattempting to reestablish the connection.

The UE may make a more constructive decision on the cells to be used forreestablishment. The probability of a successful reestablishment may beincreased, and the average time duration until the connection isreestablished may be decreased. Overall the reestablishment proceduresmay get optimized in performance and may result in much betteruser-experience of the UE which are seen e.g. as higher data-throughputor better voice quality and shorter audio-gaps.

During an ongoing connection, the mobile radio communication device mayperform the following actions. The mobile radio communication device maystore the cells that have been reported to the network by sendingmeasurement report message(s). This storing may include storing the cellreception power level and the quality level (for example RSRP (Reference(Received) Signal Code Power) and RSRQ (Reference Signal ReceivedQuality)). The mobile radio communication device may store theinformation if the measurement report message was acknowledged by thenetwork (which for example may indicate that the network received themeasurement report successfully). The mobile radio communication devicemay store only reports that indicate strong cells, and for example maynot store reports in case the report is triggered because the cell gotweak. The mobile radio communication device may exclude CSG (closedsubscriber group) or blacklisted cells, and may not use them forreestablishment as they will most likely not be prepared.

FIG. 5 shows a mobile radio communication network 500 according tovarious aspects. A mobile radio communication device 502, which may alsobe referred to as a mobile station or a user equipment (UE), may be inthe coverage area of a plurality of radio base stations, each radio basestation (or short: base station) providing one or more cells. Forexample, a first (neighbor) cell 504, a second (neighbor) cell 506, athird (neighbor) cell 508, a fourth (neighbor) cell 510, and fifth(neighbor) cell 512 may be provided. A base station may for example bean EUTRAN (Evolved Universal Terrestrial Radio Access Network) basestation, but may also be any other kind of base station configured tocommunicate with a mobile radio communication device. For example, thesixth cell 512 may be the serving cell, to which the mobile station isconnected, like indicated by two arrows 516. Like indicated in status514 of the mobile radio communication device 502, the mobile radiocommunication device 502 (in other words, the mobile station) may beconnected to the serving cell 512, and may perform measurements on theserving cell 512 and on the neighboring cells 504, 506, 508, and 510.

FIG. 6 shows an illustration 600 of the mobile radio communicationsystem 500 of FIG. 5 at another point of time. It will be understoodthat the cells and the mobile radio communication device may beidentical to the ones shown in FIG. 5, and therefore the same referencesigns may be used and duplicate description may be omitted. As indicatedin status 602 of the mobile radio communication device 502, the mobilestation may report (or send) the (measurement) results to the network(like indicated by arrow 606), and may store the reports in the mobileradio communication device 502. As illustrated in a memory portion 604of the mobile radio communication device 502, the mobile station 502 maystore results of the performed measurement.

FIG. 7 shows an illustration 700 of the mobile radio communicationsystem 500 of FIG. 5 at another point of time. It will be understoodthat the cells and the mobile radio communication device may beidentical to the ones shown in FIG. 5 and FIG. 6, and therefore the samereference signs may be used and duplicate description may be omitted. Asindicated by arrow 702, the network may confirm the reception of thereport that was send by the mobile radio communication device 502. Asindicated by status 704 of the mobile radio communication device 502,the mobile radio communication device 502 may receive the confirmationfrom the network (for example from the serving cell 512). The mobileradio communication device 502 may store that the report got confirmedby the network, like indicated by a memory portion 706 of the mobileradio communication device 502.

FIG. 8 shows an illustration 800 of the mobile radio communicationsystem 500 of FIG. 5 at another point of time. It will be understoodthat the cells and the mobile radio communication device may beidentical to the ones shown in FIG. 5, FIG. 6, and FIG. 7, and thereforethe same reference signs may be used and duplicate description may beomitted. Like indicated by memory portion 804 (which may include thememory portion 604 shown in FIG. 6 and the memory portion 706 shown inFIG. 7), the mobile radio communication device 502 may have storedresults. It will be understood that in various embodiments there may beno separate memory portions, but only one combined memory to store allthe results, for example the measurement results sent and theinformation indicating whether the network has confirmed receipt of themeasurement results. Like indicated by short arrows 806, the mobileradio communication device 502 may lose connection with the serving cell512, in other words, there may be a loss of connection. Like indicatedby status 802 of the mobile radio communication device 502, networkconnection may be lost, and the stored results may be evaluated forconnection reestablishment.

FIG. 9 shows an illustration 900 of the mobile radio communicationsystem 500 of FIG. 5 at another point of time. It will be understoodthat the cells and the mobile radio communication device may beidentical to the ones shown in FIG. 5, FIG. 6, FIG. 7, and FIG. 8, andtherefore the same reference signs may be used and duplicate descriptionmay be omitted. Like indicated by status 902 of the mobile radiocommunication device 502, the mobile radio communication device 502 may,based on the stored results, try reestablishment to a neighboring cell,for which information is stored in the memory portion 804, for exampleto the first neighbor cell 504. Like indicated by arrow 904, the mobileradio communication device 502 may attempt to perform connectionreestablishment to the first neighbor cell 504.

A detailed method used for reestablishment-cell-search according tovarious aspects may be as follows. In case the reestablishment procedurewas triggered by events which are most likely not related to servingcell quality like RLC-retransmission-errors (wherein RLC may stand forRadio Link Control), reconfiguration, handover or integrity failure, themobile radio communication device may try reestablishment on the oldserving cell and may check the serving cell quality. In case the oldserving cell was (or is) weak and out-of-sync-detection caused thereestablishment, the mobile radio communication device may not try toreestablish on the old serving cell as this one will be still bad. Themobile radio communication device may consider the reported cells as thebest cells for reestablishment, starting with those whose reports werealready acknowledged. The mobile radio communication device may continuetrying reestablishment in decreasing order of cell quality (wherein forexample the best cell comes first in the measurement report message).The mobile radio communication device may move on to older reports (forexample second last one, third last one, and so on) for additionalreestablishment attempts.

Various aspects may cover the network behavior. According to variousaspects, the network may prepare all or a specific number of cells thathave been reported by the UE. According to various aspects, the networkmay indicate cells, physical_cell_id ranges, and/or frequencies to beused for reestablishment attempts, for example the network may indicatewhat kind of reestablishments are possible, for example intra(frequency) reestablishments or inter (frequency) reestablishments. Acell in an inter frequency re-establish procedure may use a differentfrequency compared to an intra frequency reestablishment procedure.

The cell-search-procedure for reestablishment may be a procedure whichis performed in UE-IDLE mode after the interruption of the ongoingconnection and aims for quickly finding a cell, on which the UE is ableto continue the temporary interrupted connection. As the UE may havejust entered IDLE-mode, it may have only limited knowledge of currentlyavailable good cells or frequencies. However in CONNECTED-mode justbefore the interruption, the UE may have lots of information likecell-lists, frequency list, quality of serving cell and neighbor cellsand most important the knowledge, which cells (and/or frequencies) theUE reported to the NW as being cells with good quality for the UE. Mostlikely only those cells will get the information (for example the UEcontext which carries e.g. configuration-details, cipher information,etc.) within the network to be able to continue (or to reestablish) theconnection. For example, the UE context may be exchange during ahandover preparation. The UE context may include UE Radio Accesscapabilities (for example information about the capabilities of the UE,e.g. about 2G (second generation) ability, about 3G (third generation)ability, about power class of the UE, about supported bands, about FDD(frequency division duplex) support, about TDD (time division duplex)support, about supported features (for example ROHC (Robust HeaderCompression), handover, reselection to other RATs (radio accesstechnologies), features according the Feature Group Indicators); aboutsupported cipher keys, and about supported integrity keys). The UEcontext may include an AS (access stratum) context (for exampleincluding information about local EUTRAN context, e.g. Source Cell-ID,shortMAX-ID for continuing of security methods). The UE context mayinclude information about AS configuration (for example presentmeasurement configuration of the UE, dedicated resource configuration,security methods, C-RNTI (Cell Radio Network Temporary Identity; forexample an identifier of the UE), MIB (master information block), SIB1(system information block 1), SIB2 (system information block 2), antennainformation, or carrier frequency).

Parts of or the whole gathered information during connected mode may beused and especially the information that the mobile radio communicationdevice has sent to the network for the cell search in idle-mode.

The mobile station may store the information about serving and neighborcells measurement results which the mobile station reported to thenetwork during an ongoing connection.

The mobile station may consider defined criteria to decide if a reportedcell shall be stored in the mobile station or not. The criteria mayinclude the measured quality of the cell and the reason why the cell wasreported.

The mobile station may save the information about the cell specificmeasurement results for each of the stored cells.

The mobile station may store, for each reported message, whether thenetwork has confirmed the reception of the message or not.

The mobile station may use the stored information to perform aConnection Reestablishment procedure by using the stored cellinformation to derive the order of cells for searching of a cell, tryingto synchronize on the cell and attempting a Connection Reestablishment.

According to various embodiments, information from an UE's connectedmode (for example information sent by the UE in the connected mode) maybe reused in idle mode.

The information from UE's connected mode may repeatedly be used in Idlemode. For example, after choosing the first cell and getting rejected onit, the UE may continue with other available information by selectingand trying reestablishment on further cells.

The various methods and device may for example be used in an LTE (LongTerm Evolution)-Network (for example E-UTRAN), or for the GSM-UEoperating in the GSM-network (for example GERAN (GSM EDGE (Enhanced Datarates for GSM Evolution) Radio Access Network)) or in any othercommunication networks.

According to various aspects, some procedures may be specified, where anUE may be sure that the chosen cell is prepared. This may be achieved ifthe target cell broadcasts (as soon as it got prepared) in some systeminformation, that it is a prepared cell. Various options may bepossible:

-   -   Broadcasting just a flag, which indicates that the cell is a        prepared cell. Herewith at least some improvement in the cell        search can be achieved.    -   Broadcasting the old ID (identifier, for example C-RNTI (Cell        Radio Network Temporary Identity)) from the UE, whose context        was moved to the target cell, so that other mobiles do not try        reestablishment and the own UE is sure, that the cell was at        least prepared with its context.    -   Broadcasting more IDs, if it is possible that a cell is prepared        for more than one UE.    -   Broadcasting the ID(s) in existing SIB1 (System Information        Block 1) or SIB2 (System Information Block 2), which may be        mandatory to be received before reestablishment.    -   Broadcasting the ID(s) in a new defined SIB (System Information        Block), which then may only be mandatory to be read by UEs        searching for a cell for reestablishment.

The mobile radio communication device and the mobile radio communicationnetwork may be configured according to at least one of the followingradio access technologies: a Bluetooth radio communication technology,an Ultra Wide Band (UWB) radio communication technology, and/or aWireless Local Area Network radio communication technology (for exampleaccording to an IEEE 802.11 (for example IEEE 802.11n) radiocommunication standard)), IrDA (Infrared Data Association), Z-Wave andZigBee, HiperLAN/2 ((HIgh PErformance Radio LAN; an alternative ATM-like5 GHz standardized technology), IEEE 802.11a (5 GHz), IEEE 802.11g (2.4GHz), IEEE 802.11n, IEEE 802.11VHT (VHT=Very High Throughput), WorldwideInteroperability for Microwave Access (WiMax) (for example according toan IEEE 802.16 radio communication standard, for example WiMax fixed orWiMax mobile), WiPro, HiperMAN (High Performance Radio Metropolitan AreaNetwork) and/or IEEE 802.16m Advanced Air Interface, a Global System forMobile Communications (GSM) radio communication technology, a GeneralPacket Radio Service (GPRS) radio communication technology, an EnhancedData Rates for GSM Evolution (EDGE) radio communication technology,and/or a Third Generation Partnership Project (3GPP) radio communicationtechnology (for example UMTS (Universal Mobile TelecommunicationsSystem), FOMA (Freedom of Multimedia Access), 3GPP LTE (Long TermEvolution), 3GPP LTE Advanced (Long Term Evolution Advanced)), CDMA2000(Code division multiple access 2000), CDPD (Cellular Digital PacketData), Mobitex, 3G (Third Generation), CSD (Circuit Switched Data),HSCSD (High-Speed Circuit-Switched Data), UMTS (3G) (Universal MobileTelecommunications System (Third Generation)), W-CDMA (UMTS) (WidebandCode Division Multiple Access (Universal Mobile TelecommunicationsSystem)), HSPA (High Speed Packet Access), HSDPA (High-Speed DownlinkPacket Access), HSUPA (High-Speed Uplink Packet Access), HSPA+ (HighSpeed Packet Access Plus), UMTS-TDD (Universal Mobile TelecommunicationsSystem-Time-Division Duplex), TD-CDMA (Time Division-Code DivisionMultiple Access), TD-SCDMA (Time Division-Synchronous Code DivisionMultiple Access), 3GPP Rel. 8 (Pre-4G) (3rd Generation PartnershipProject Release 8 (Pre-4th Generation)), UTRA (UMTS Terrestrial RadioAccess), E-UTRA (Evolved UMTS Terrestrial Radio Access), LTE Advanced(4G) (Long Term Evolution Advanced (4th Generation)), cdmaOne (2G),CDMA2000 (3G) (Code division multiple access 2000 (Third generation)),EV-DO (Evolution-Data Optimized or Evolution-Data Only), AMPS (1G)(Advanced Mobile Phone System (1st Generation)), TACS/ETACS (TotalAccess Communication System/Extended Total Access Communication System),D-AMPS (2G) (Digital AMPS (2nd Generation)), PTT (Push-to-talk), MTS(Mobile Telephone System), IMTS (Improved Mobile Telephone System), AMTS(Advanced Mobile Telephone System), OLT (Norwegian for OffentligLandmobil Telefoni, Public Land Mobile Telephony), MTD (Swedishabbreviation for Mobiltelefonisystem D, or Mobile telephony system D),Autotel/PALM (Public Automated Land Mobile), ARP (Finnish forAutoradiopuhelin, “car radio phone”), NMT (Nordic Mobile Telephony),Hicap (High capacity version of NTT (Nippon Telegraph and Telephone)),DataTAC, iDEN (Integrated Digital Enhanced Network), PDC (PersonalDigital Cellular), PHS (Personal Handy-phone System), WIDEN (WidebandIntegrated Digital Enhanced Network), iBurst, Unlicensed Mobile Access(UMA, also referred to as 3GPP Generic Access Network, or GAN standard).

The following examples pertain to further aspects.

Example 1 is a mobile radio communication device configured to operatein a first communication state and in a second communication state, themobile radio communication device comprising: a transmitter configuredto transmit data to a mobile radio communication network when the mobileradio communication device is in a first communication state in whichthe mobile radio communication device is in a connection with a cell ofthe mobile radio communication network; a memory configured to storeinformation based on the transmitted data; a cell determination circuitconfigured to determine a cell of a mobile radio communication networkas a connection candidate based on the stored information; and aconnection request circuit configured to request connection with thedetermined cell when the mobile radio communication device is in asecond communication state in which the mobile radio communicationdevice seeks a connection with a cell of a mobile radio communicationnetwork.

In example 2, the subject-matter of any one Example 1 can optionallyinclude that the first communication state is a connected state.

In example 3, the subject-matter of any one of Examples 1-2 canoptionally include that the second communication state is one of aconnected state in which connection has been temporarily lost or an idlestate.

In example 4, the subject-matter of any one of Examples 1-3 canoptionally include that the data comprises reception quality informationindicating a reception quality from a neighboring cell.

In example 5, the subject-matter of any one of Examples 1-4 canoptionally include that the data comprises a measurement report.

In example 6, the subject-matter of Example 4 can optionally includethat the information comprises information identifying the neighboringcell.

In example 7, the subject-matter of any one of Examples 4 or 6 canoptionally include that the information comprises at least one ofinformation identifying the reception quality, information indicating areason why the mobile radio communication device is seeking a connectionwith a cell, or information indicating a timing.

In example 8, the subject-matter of Example 7 can optionally includethat the cell determination circuit is further configured to determinethe cell based on the reception quality.

In example 9, the subject-matter of any one of Examples 7-8 canoptionally include that the cell determination circuit is furtherconfigured to determine a cell with a maximum reception quality as thecell.

In example 10, the subject-matter of any one of Examples 1-9 canoptionally include a measurement circuit configured to measure areception quality from a neighboring cell.

In example 11, the subject-matter of any one of Examples 1-10 canoptionally include a receiver configured to receive a confirmation ofreceipt of the data from the mobile radio communication network.

In example 12, the subject-matter of Example 11 can optionally includethat the information comprises information indicating receipt of theconfirmation of receipt.

In example 13, the subject-matter of Example 12 can optionally includethat the cell determination circuit is further configured to determinethe cell based on the information indicating receipt of the confirmationof receipt.

In example 14, the subject-matter of any one of Examples 12-13 canoptionally include that the cell determination circuit is furtherconfigured to determine a cell for which receipt is confirmed.

Example 15 is a method for controlling a mobile radio communicationdevice to operate in a first communication state and in a secondcommunication state, the method comprising: transmitting data to amobile radio communication network when the mobile radio communicationdevice is in a first communication state; storing information based onthe transmitted data in which the mobile radio communication device isin a connection with a cell of the mobile radio communication network;determining a cell of a mobile radio communication network as aconnection candidate based on the stored information; and requestingconnection with the determined cell when the mobile radio communicationdevice is in a second communication state in which the mobile radiocommunication device seeks a connection with a cell of a mobile radiocommunication network.

In example 16, the subject-matter of Example 15 can optionally includethat the first communication state is a connected state.

In example 17, the subject-matter of any one of Examples 15-16 canoptionally include that the second communication state is one of aconnected state in which connection has been temporarily lost or an idlestate.

In example 18, the subject-matter of any one of Examples 15-17 canoptionally include that the data comprises reception quality informationindicating a reception quality from a neighboring cell.

In example 19, the subject-matter of any one of Examples 15-19 canoptionally include that the data comprises a measurement report.

In example 20, the subject-matter of Example 18 can optionally includethat the information comprises information identifying the neighboringcell.

In example 21, the subject-matter of any one of Examples 18 or 21 canoptionally include that the information comprises at least one ofinformation identifying the reception quality, information indicating areason why the mobile radio communication device is seeking a connectionwith a cell, or information indicating a timing.

In example 22, the subject-matter of Example 21 can optionally includedetermining the cell based on the reception quality.

In example 23, the subject-matter of any one of Examples 21-22 canoptionally include determining a cell with a maximum reception qualityas the cell.

In example 24, the subject-matter of any one of Examples 15-23 canoptionally include measuring a reception quality from a neighboringcell.

In example 25, the subject-matter of any one of Examples 15-24 canoptionally include receiving a confirmation of receipt of the data fromthe mobile radio communication network.

In example 26, the subject-matter of Example 25 can optionally includethat the information comprises information indicating receipt of theconfirmation of receipt.

In example 27, the subject-matter of Example 26 can optionally includedetermining the cell based on the information indicating receipt of theconfirmation of receipt.

In example 28, the subject-matter of any one of Examples 26-27 canoptionally include determining a cell for which receipt is confirmed.

Example 29 is a mobile radio communication device configured to operatein a first communication state and in a second communication state, themobile radio communication device comprising: a transmitter means fortransmitting data to a mobile radio communication network when themobile radio communication device is in a first communication state inwhich the mobile radio communication device is in a connection with acell of the mobile radio communication network; a memory means forstoring information based on the transmitted data; a cell determinationmeans for determining a cell of a mobile radio communication network asa connection candidate based on the stored information; and a connectionrequest means for requesting connection with the determined cell whenthe mobile radio communication device is in a second communication statein which the mobile radio communication device seeks a connection with acell of a mobile radio communication network.

In example 30, the subject-matter of Example 29 can optionally includethat the first communication state is a connected state.

In example 31, the subject-matter of any one of Examples 29-30 canoptionally include that the second communication state is one of aconnected state in which connection has been temporarily lost or an idlestate.

In example 32, the subject-matter of any one of Examples 29-31 canoptionally include that the data comprises reception quality informationindicating a reception quality from a neighboring cell.

In example 33, the subject-matter of any one of Examples 29-32 canoptionally include that the data comprises a measurement report.

In example 34, the subject-matter of Example 32 can optionally includethat the information comprises information identifying the neighboringcell.

In example 35, the subject-matter of any one of Examples 32 or 34 canoptionally include that the information comprises at least one ofinformation identifying the reception quality, information indicating areason why the mobile radio communication device is seeking a connectionwith a cell, or information indicating a timing.

In example 36, the subject-matter of Example 35 can optionally includethat the cell determination means is further for determining the cellbased on the reception quality.

In example 37, the subject-matter of any one of Examples 35-36 canoptionally include that the cell determination means is further fordetermining a cell with a maximum reception quality as the cell.

In example 38, the subject-matter of any one of Examples 29-37 canoptionally include a measurement means for measuring a reception qualityfrom a neighboring cell.

In example 39, the subject-matter of any one of Examples 29-38 canoptionally include a receiver means for receiving a confirmation ofreceipt of the data from the mobile radio communication network.

In example 40, the subject-matter of Example 39 can optionally includethat the information comprises information indicating receipt of theconfirmation of receipt.

In example 41, the subject-matter of Example 40 can optionally includethat the cell determination means is further for determining the cellbased on the information indicating receipt of the confirmation ofreceipt.

In example 42, the subject-matter of any one of Examples 40-41 canoptionally include that the cell determination means is further fordetermining a cell for which receipt is confirmed.

Example 43 is a computer readable medium including program instructionswhich when executed by a processor cause the processor to perform amethod for controlling a mobile radio communication device to operate ina first communication state and in a second communication state, thecomputer readable medium further including program instructions whichwhen executed by a processor cause the processor to perform:transmitting data to a mobile radio communication network when themobile radio communication device is in a first communication state inwhich the mobile radio communication device is in a connection with acell of the mobile radio communication network; storing informationbased on the transmitted data; determining a cell of a mobile radiocommunication network as a connection candidate based on the storedinformation; and requesting connection with the determined cell when themobile radio communication device is in a second communication state inwhich the mobile radio communication device seeks a connection with acell of a mobile radio communication network.

In example 44, the subject-matter of Example 43 can optionally includethat the first communication state is a connected state.

In example 45, the subject-matter of any one of Examples 43-44 canoptionally include that the second communication state is one of aconnected state in which connection has been temporarily lost or an idlestate.

In example 46, the subject-matter of any one of Examples 43-45 canoptionally include that the data comprises reception quality informationindicating a reception quality from a neighboring cell.

In example 47, the subject-matter of any one of Examples 43-46 canoptionally include that the data comprises a measurement report.

In example 48, the subject-matter of Example 46 can optionally includethat the information comprises information identifying the neighboringcell.

In example 49, the subject-matter of any one of Examples 46 or 48 canoptionally include that the information comprises at least one ofinformation identifying the reception quality, information indicating areason why the mobile radio communication device is seeking a connectionwith a cell, or information indicating a timing.

In example 50, the subject-matter of Example 49 can optionally includeprogram instructions which when executed by a processor cause theprocessor to perform: determining the cell based on the receptionquality.

In example 51, the subject-matter of any one of Examples 49 or 50 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: determining a cell with amaximum reception quality as the cell.

In example 52, the subject-matter of any one of Examples 43-51 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: measuring a reception qualityfrom a neighboring cell.

In example 53, the subject-matter of any one of Examples 43-52 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: receiving a confirmation ofreceipt of the data from the mobile radio communication network.

In example 54, the subject-matter of Example 53 can optionally includethat the information comprises information indicating receipt of theconfirmation of receipt.

In example 55, the subject-matter of Example 54 can optionally includeprogram instructions which when executed by a processor cause theprocessor to perform: determining the cell based on the informationindicating receipt of the confirmation of receipt.

In example 56, the subject-matter of any one of Examples 54 or 55 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: determining a cell for whichreceipt is confirmed.

Example 57 is a mobile radio communication network comprising: aplurality of cells, wherein a first cell of the plurality of cells isconfigured to receive data from a mobile radio communication device; anda configuration information transmitter configured to transmit to asecond cell of the plurality of cells configuration information based onthe received information.

In example 58, the subject-matter of Example 57 can optionally include aconfiguration indication transmitter configured to transmit to themobile radio communication device an indication indicating that themobile radio communication network has transmitted configurationinformation to the second cell.

In example 59, the subject-matter of Example 58 can optionally includethat the indication comprises at least one of an identifier of the cell,a frequencies to be used for reestablishment attempts, an indication ofwhether intra reestablishments are possible or an indication of whetherinter reestablishments are possible.

In example 60, the subject-matter of any one of Examples 57-59 canoptionally include that the configuration information transmitter isfurther configured to transmit the configuration information to aplurality of cells.

In example 61, the subject-matter of any one of Examples 57-60 canoptionally include that the configuration information transmitter isfurther configured to broadcast the configuration information.

In example 62, the subject-matter of Example 60 can optionally includethat the configuration information comprises a flag indicating thesecond cell.

In example 63, the subject-matter of any one of Examples 58-59 canoptionally include that the second cell comprises the configurationindication transmitter.

In example 64, the subject-matter of Examples 63 can optionally includethat the configuration indication transmitter is further configured totransmit the indication to a plurality of mobile radio communicationdevices.

In example 65, the subject-matter of any one of Examples 63-64 canoptionally include that the configuration indication transmitter isfurther configured to broadcast the indication.

In example 66, the subject-matter of any one of Examples 63-65 canoptionally include that the indication comprises at least one of a flagindicating that the second cell has received the configurationinformation, an identifier of the cell to which the mobile radiocommunication device was connected before, identifiers of a plurality ofmobile radio communication devices for which the cell has receivedconfiguration information.

In example 67, the subject-matter of any one of Examples 57-66 canoptionally include that the configuration information comprises acontext of the mobile radio communication device.

In example 68, the subject-matter of any one of Examples 57-67 canoptionally include that the configuration information comprises at leastone of configuration details of the mobile radio communication device,frequencies used for communication of the mobile radio communicationdevice with the mobile radio communication network, capabilities of themobile radio communication or cipher information.

Example 69 is a method for controlling a mobile radio communication, themethod comprising: receiving in a first cell of a plurality of cells ofthe mobile radio communication network data from a mobile radiocommunication device; and transmitting to a second cell of the pluralityof cells configuration information based on the received information.

In example 70, the subject-matter of Example 69 can optionally includetransmitting to the mobile radio communication device an indicationindicating that the mobile radio communication network has transmittedconfiguration information to the second cell.

In example 71, the subject-matter of Example 70 can optionally includethat the indication comprises at least one of an identifier of the cell,a frequencies to be used for reestablishment attempts, an indication ofwhether intra reestablishments are possible or an indication of whetherinter reestablishments are possible.

In example 72, the subject-matter of any one of Examples 69-71 canoptionally include transmitting the configuration information to aplurality of cells.

In example 73, the subject-matter of any one of Examples 69-72 canoptionally include broadcasting the configuration information.

In example 74, the subject-matter of Example 72 can optionally includethat the configuration information comprises a flag indicating thesecond cell.

In example 75, the subject-matter of any one of Examples 70-71 canoptionally include transmitting the indication from the second cell.

In example 76, the subject-matter of Example 75 can optionally includetransmitting the indication to a plurality of mobile radio communicationdevices.

In example 77, the subject-matter of any one of Examples 75-76 canoptionally include broadcasting the indication.

In example 78, the subject-matter of any one of Examples 75-77 canoptionally include that the indication comprises at least one of a flagindicating that the second cell has received the configurationinformation, an identifier of the cell to which the mobile radiocommunication device was connected before, identifiers of a plurality ofmobile radio communication devices for which the cell has receivedconfiguration information.

In example 79, the subject-matter of any one of Examples 69-78 canoptionally include that the configuration information comprises acontext of the mobile radio communication device.

In example 80, the subject-matter of any one of Examples 69-79 canoptionally include that the configuration information comprises at leastone of configuration details of the mobile radio communication device,frequencies used for communication of the mobile radio communicationdevice with the mobile radio communication network, capabilities of themobile radio communication or cipher information.

Example 81 is a mobile radio communication network comprising: aplurality of cells, wherein a first cell of the plurality of cells isconfigured to receive data from a mobile radio communication device; anda configuration information transmitter means for transmitting to asecond cell of the plurality of cells configuration information based onthe received information.

In example 82, the subject-matter of Example 81 can optionally include aconfiguration indication transmitter means for transmitting to themobile radio communication device an indication indicating that themobile radio communication network has transmitted configurationinformation to the second cell.

In example 83, the subject-matter of Example 82 can optionally includethat the indication comprises at least one of an identifier of the cell,a frequencies to be used for reestablishment attempts, an indication ofwhether intra reestablishments are possible or an indication of whetherinter reestablishments are possible.

In example 84, the subject-matter of any one of Examples 81-83 canoptionally include that the configuration information transmitter meansis further for transmitting the configuration information to a pluralityof cells.

In example 85, the subject-matter of any one of Examples 81-84 canoptionally include that the configuration information transmitter meansis further for broadcasting the configuration information.

In example 86, the subject-matter of any one of Examples 84 canoptionally include that the configuration information comprises a flagindicating the second cell.

In example 87, the subject-matter of any one of Examples 82-83 canoptionally include that the second cell comprises the configurationindication transmitter means.

In example 88, the subject-matter of Example 87 can optionally includethat the configuration indication transmitter means is further fortransmitting the indication to a plurality of mobile radio communicationdevices.

In example 89, the subject-matter of any one of Examples 87-88 canoptionally include that the configuration indication transmitter meansis further for broadcasting the indication.

In example 90, the subject-matter of any one of Examples 87-89 canoptionally include that the indication comprises at least one of a flagindicating that the second cell has received the configurationinformation, an identifier of the cell to which the mobile radiocommunication device was connected before, identifiers of a plurality ofmobile radio communication devices for which the cell has receivedconfiguration information.

In example 91, the subject-matter of any one of Examples 81-90 canoptionally include that the configuration information comprises acontext of the mobile radio communication device.

In example 92, the subject-matter of any one of Examples 81-91 canoptionally include that the configuration information comprises at leastone of configuration details of the mobile radio communication device,frequencies used for communication of the mobile radio communicationdevice with the mobile radio communication network, capabilities of themobile radio communication or cipher information.

Example 93 is a computer readable medium including program instructionswhich when executed by a processor cause the processor to perform amethod for controlling a mobile radio communication, the computerreadable medium further including program instructions which whenexecuted by a processor cause the processor to perform: receiving in afirst cell of a plurality of cells of the mobile radio communicationnetwork data from a mobile radio communication device; and transmittingto a second cell of the plurality of cells configuration informationbased on the received information.

In example 94, the subject-matter of Example 93 can optionally includeprogram instructions which when executed by a processor cause theprocessor to perform: transmitting to the mobile radio communicationdevice an indication indicating that the mobile radio communicationnetwork has transmitted configuration information to the second cell.

In example 95, the subject-matter of Example 94 can optionally includethat the indication comprises at least one of an identifier of the cell,a frequencies to be used for reestablishment attempts, an indication ofwhether intra reestablishments are possible or an indication of whetherinter reestablishments are possible.

In example 96, the subject-matter of any one of Examples 93-95 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: transmitting the configurationinformation to a plurality of cells.

In example 97, the subject-matter of any one of Examples 93-96 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: broadcasting the configurationinformation.

In example 98, the subject-matter of Example 96 can optionally includethat the configuration information comprises a flag indicating thesecond cell.

In example 99, the subject-matter of any one of Examples 94-95 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: transmitting the indicationfrom the second cell.

In example 100, the subject-matter of Example 99 can optionally includeprogram instructions which when executed by a processor cause theprocessor to perform: transmitting the indication to a plurality ofmobile radio communication devices.

In example 101, the subject-matter of any one of Examples 99-100 canoptionally include program instructions which when executed by aprocessor cause the processor to perform: broadcasting the indication.

In example 102, the subject-matter of any one of Examples 99-101 canoptionally include that the indication comprises at least one of a flagindicating that the second cell has received the configurationinformation, an identifier of the cell to which the mobile radiocommunication device was connected before, identifiers of a plurality ofmobile radio communication devices for which the cell has receivedconfiguration information.

In example 103, the subject-matter of any one of Examples 93-102 canoptionally include that the configuration information comprises acontext of the mobile radio communication device.

In example 104, the subject-matter of any one of Examples 93-103 canoptionally include that the configuration information comprises at leastone of configuration details of the mobile radio communication device,frequencies used for communication of the mobile radio communicationdevice with the mobile radio communication network, capabilities of themobile radio communication or cipher information.

While specific aspects have been described, it should be understood bythose skilled in the art that various changes in form and detail may bemade therein without departing from the spirit and scope of the aspectsof this disclosure as defined by the appended claims. The scope is thusindicated by the appended claims and all changes which come within themeaning and range of equivalency of the claims are therefore intended tobe embraced.

What is claimed is:
 1. A circuit arrangement for a User Equipment, thecircuit arrangement comprising: circuitry configured to generate ameasurement report for a mobile radio communication network when theUser Equipment is in a first Radio Resource Control communication statein which the User Equipment is in a connection with a cell of the mobileradio communication network; a memory configured to store informationidentifying reception quality based on the measurement report generatedduring the first Radio Resource Control communication state; and aprocessor configured to identify from the stored information based onthe measurement report generated during the first Radio Resource Controlcommunication state a cell of the mobile radio communication networkhaving a maximum reception quality as a connection candidate cell;wherein the processor is further configured to establish connection withthe connection candidate cell identified from the stored informationbased on the measurement report generated during the first RadioResource Control communication state and to perform a Radio ResourceControl re-establishment procedure based on the established connectionwith the connection candidate cell when the User Equipment is in asecond Radio Resource Control communication state.
 2. The circuitarrangement of claim 1, wherein the first Radio Resource Controlcommunication state is a Radio Resource Control connected state.
 3. Thecircuit arrangement of claim 1, wherein the second Radio ResourceControl communication state is one of a Radio Resource Control connectedstate in which connection has been temporarily lost or is a RadioResource Control idle state.
 4. The circuit arrangement of claim 1,wherein the processor is further configured to exclude blacklisted cellsfrom requesting the connection.
 5. The circuit arrangement of claim 1,further comprising: a transmitter configured to transmit the measurementreport to the mobile radio communication network when the User Equipmentis in the first Radio Resource Control communication state in which theUser Equipment is in the connection with the cell of the mobile radiocommunication network.
 6. The circuit arrangement of claim 5, wherein aplurality of additional connection candidate cells, in addition to thecell of the mobile communication network in the first Radio ResourceControl communication state, are prepared with context information bythe radio communication network for the Radio Resource Controlre-establishment procedure.
 7. A circuit arrangement for a UserEquipment, the circuit arrangement comprising: circuitry configured togenerate a Radio Resource Control measurement report for a mobile radiocommunication network when in a Radio Resource Control connected state;a memory configured to store information identifying reception qualitybased on the Radio Resource Control measurement report generated duringthe Radio Resource Control connected state; a processor configured todetermine a cell of the mobile radio communication network as a RadioResource Control connection re-establishment candidate cell based on thestored reported reception quality based on the Radio Resource Controlmeasurement report generated during the Radio Resource Control connectedstate; wherein the processor is further configured to request RadioResource Control connection re-establishment with a determined RadioResource Control connection re-establishment candidate cell determinedfrom the stored reported reception quality based on the Radio ResourceControl measurement report generated during the Radio Resource Controlconnected state when the User Equipment detects a radio link failure;and wherein the processor is further configured to exclude blacklistedcells from requesting the connection.
 8. The circuit arrangement ofclaim 7, wherein the processor is configured to determine a cell with amaximum reception quality as the cell from determined Radio ResourceControl connection re-establishment connection candidate cells.
 9. Thecircuit arrangement of claim 7, further comprising: a transmitterconfigured to transmit the Radio Resource Control measurement report tothe mobile radio communication network when the User Equipment is in thefirst Radio Resource Control communication state in which the UserEquipment is in the Radio Resource Control connected state with a cellof the mobile radio communication network.
 10. A method of operating acircuit arrangement of a User Equipment, comprising: generating ameasurement report for a mobile radio communication network when theUser Equipment is in a first Radio Resource Control communication statein which the User Equipment is in a connection with a cell of the mobileradio communication network; storing information identifying receptionquality based on the measurement report generated during the first RadioResource Control communication state; determining from the storedinformation based on the measurement report generated during the firstRadio Resource Control communication state a cell of the mobile radiocommunication network with a maximum reception quality as a connectioncandidate cell; and requesting connection with a determined connectioncandidate cell identified from the stored information based on themeasurement report generated during the first Radio Resource Controlcommunication state when the User Equipment is in a second RadioResource Control communication state in which the User Equipment seeks aconnection with a cell of a mobile radio communication network, therebyperforming a Radio Resource Control re-establishment procedure.
 11. Themethod of claim 10, wherein the first Radio Resource Controlcommunication state is a Radio Resource Control connected state.
 12. Themethod of claim 10, wherein the second Radio Resource Controlcommunication state is one of a Radio Resource Control connected statein which connection has been temporarily lost or is a Radio ResourceControl idle state.
 13. The method of claim 10, further comprising:excluding blacklisted cells from requesting the connection.
 14. A UserEquipment, comprising: a transmitter configured to transmit ameasurement report to a mobile radio communication network when the UserEquipment is in a first Radio Resource Control communication state inwhich the User Equipment is in a connection with a cell of the mobileradio communication network; a memory configured to store informationidentifying reception quality based on the measurement report generatedduring the first Radio Resource Control communication state; and aprocessor configured to determine from the stored information based onthe measurement report generated during the first Radio Resource Controlcommunication state a cell of the mobile radio communication networkwith a maximum reception quality as a connection candidate cell; whereinthe processor is further configured to request connection with adetermined connection candidate cell determined from the storedinformation based on the measurement report generated during the firstRadio Resource Control communication state when the User Equipment is ina second Radio Resource Control communication state in which the UserEquipment seeks a connection with a cell of a mobile radio communicationnetwork, thereby performing a Radio Resource Control re-establishmentprocedure.
 15. A non-transitory computer readable medium storingprocessor-executable instructions that when executed cause a processorto perform a method of operating a circuit arrangement of a UserEquipment, the method comprising: generating a measurement report for amobile radio communication network when the User Equipment is in a firstRadio Resource Control communication state in which the User Equipmentis in a connection with a cell of the mobile radio communicationnetwork; storing information identifying reception quality based on themeasurement report generated during the first Radio Resource Controlcommunication state; determining from the stored information based onthe measurement report generated during the first Radio Resource Controlcommunication state a cell of the mobile radio communication networkwith a maximum reception quality as a connection candidate cell; andrequesting connection with a determined connection candidate celldetermined from the stored information based on the measurement reportgenerated during the first Radio Resource Control communication statewhen the User Equipment is in a second Radio Resource Controlcommunication state in which the User Equipment seeks a connection witha cell of a mobile radio communication network, thereby performing aRadio Resource Control re-establishment procedure.
 16. Thenon-transitory computer readable medium of claim 15, wherein the firstRadio Resource Control communication state is a Radio Resource Controlconnected state.
 17. The non-transitory computer readable medium ofclaim 15, wherein the second Radio Resource Control communication stateis one of a Radio Resource Control connected state in which connectionhas been temporarily lost or is a Radio Resource Control idle state.